Eur. Phys. J. C 20, 713-716 (2001)
DOI: 10.1007/s100520100693

Klein-Gordon equation from the path integral formalism

D. Felea¹, C. Besliu², I.S. Zgura¹, R. Marginean¹, Al. Jipa² and R.I. Nanciu<sup>1

1</sup>  Institute of Space Sciences, Bucharest-Magurele, P.O. Box MG 23, 76900, Romania
²  Faculty of Physics, University of Bucharest, Bucharest-Magurele, P.O. Box MG 11, 76900, Romania

felea@venus.nipne.ro

(Received: 9 March 2001 / Published online: 13 June 2001 -© Springer-Verlag / Società Italiana di Fisica 2001)

Abstract
By using Feynman's path integral formalism in the second order for the relativistic Lagrangian for a spinless particle in a gauge field and applying the covariant derivative instead of the commonly used derivative, but without knowing the operator expressions for the momentum and energy, one can obtain the Klein-Gordon equation.

© Società Italiana di Fisica, Springer-Verlag 2001